ÇAĞRILI KONUŞMALAR / KEYNOTES Invited Speeches ... - TPJD

Designing Lost Circulation Pills for Polymer Based Drill-In Fluids
Alper Kahvecioğlu 1 , İ. Hakkı Gücüyener 3 , Serhat Akın 2
1 Turkish Petroleum Corporation, Research Center, Ankara
2 Middle East Technical University, Ankara
3 Karkim CO., Ankara
Specially designed non-damaging lost circulation pills (LCP) are being effectively applied for drilling
depleted zones worldwide. Optimizing the LCP compositions stop the lost circulation effectively
and protect the production zone from liquid and solids invasion significantly. Shape, particle
size distribution and concentration of the lost circulation materials (LCM) are key parameters
determining the effectiveness of LCP. In this study, the Permeability Plugging Apparatus (PPA)
is utilized to evaluate effectiveness of various LCM’s in curing the lost circulation. Sized calcium
carbonates are used as LCM in different concentrations and in different particle size distribution.
Lost circulation zones are simulated using the ceramic disks and slotted disks. Ceramic disks
with nominal pore sizes 20, 35, 60, 90, and 150 microns are characterized in terms of pore size
distribution using the computerized image analysis technique. Filter cake quality, spurt loss and
filtrate volume are basic parameters to be evaluated in this study. Tests are performed at 75 F
and 300 psi of differential.
Keywords : Drilling, drilling fluid, drilling mud, lost circulation, lost circulation pill, lost
circulation material, calcium carbonate, micronized cellulose, viscous pill
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